Approximate expressions describing their broadening, compressing, attenuation and amplification are given.
给出了描述它们展宽、压缩、衰减和放大的近似表达式。
The assumption of equal signal and pump attenuation coefficients is no longer required, while the iteration step-size can be significantly enlarged even under saturated amplification.
该算法不用假设抽运光和信号光衰减系数相同，且可大大增加饱和放大状态下的迭代步长。
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